Question # 1

Group nuebr tells about the

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Number of shells

Number of valence electrons

Both a and b

None of these

Which particle is present in differente number in the isotopes.

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Proton

Electron

Neutron

Both neutron and electron

According to Arrhenius concept base is a substance which dissociates in aqueios solution to give

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Hydroxide ions

Hydrogen ions

Pair of Electrons

Proton

Main group elements are arranged in ..............groups.

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7

6

8

10

Which acid is used in he preparation of soaf.

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Oxalic Acid

Citric Acid

Stearic Acid

Tartaric Acid

Whcih compound contains both covalent and ionic bonds.

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MgCl₂

PCl5

NH₄Cl

CaO

Uni of electron affinity is.

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k J mol-1

k jmol

pm

Newton

All the noble gases have their valence electrons.

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Incomplete

Partialy filled

Completely filled

None of the above

If reversibe reaction useful for preparing compounds on large scale.

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Yes

No

They are useful only when equilirbium lies far to the left side

They are useful only when equilibrium lies far to the right side

Building block of all matter is.

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element

Compound

Mixture

Atom

How many electrons are involved in the formation of signle covalent bond

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One

Two

Three

Four

How many electrons can be accommodated at the msot in the third shell of the elements.

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8

12

10

18

How many electrons can be accommodated at the most in the third shell of the elements.

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8

10

18

32

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